Hi Svetlana,
It's great to hear that you and your delegation will be visiting Dublin soon. Thanks also to Antonia for her excellent and helpful answer!
To ensure that you arrive on time, I would agree with Antonia and say that it's a good idea to schedule a taxi or private bus transfer to bring you directly from the airport to your destination. You can learn more about
taxis in Ireland here.
In terms of things to see and do in Dublin, there are many great options and it depends on your group's interests and the amount of free time you all have. This
Dublin in 72 Hours page might prove helpful to you when making a plan.
Regards,
Eoin